History of Earth vocabulary

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Habitable

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Having the conditions necessary to support life.

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Sedimentary Rock

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Rocks that form from the bonding of rock fragments such as sand, silt, or clay; from organic materials; and from chemicals dissolved in water.

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Channel

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A long, narrow groove that forms where water, lava, or other liquid flows.

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Fossil

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Remains or impression of an organism preserved in petrified rock.

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Metamorphic Rock

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Rocks that form when other rocks are changed by heat and pressure.

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Biosphere

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The global sum of all ecosystems; the zone of life on Earth.

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Geological Process

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Processes that shape the Earth, including erosion, sedimentation, and plate tectonics.

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Eon

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The largest division of geological time, comprising two or more eras.

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Extinction

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The end of an organism or a group of organisms, typically due to environmental changes.

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Period

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A subdivision of geological time that is shorter than an era.